Resolve "Remove unused `users.support_bot`"

config/pseudonymizer.yml

@@ -470,7 +470,7 @@ tables:
     - ghost
     - last_activity_on
     - notified_of_own_activity
-    - support_bot
+    - bot_type
     - preferred_language
     - theme_id
 

db/schema.rb

@@ -3289,7 +3289,6 @@ ActiveRecord::Schema.define(version: 20190530154715) do
     t.boolean "ghost"
     t.date "last_activity_on"
     t.boolean "notified_of_own_activity"
-    t.boolean "support_bot"
     t.string "preferred_language"
     t.boolean "email_opted_in"
     t.string "email_opted_in_ip"
@@ -3322,8 +3321,6 @@ ActiveRecord::Schema.define(version: 20190530154715) do
     t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
     t.index ["state"], name: "index_users_on_state", using: :btree
     t.index ["state"], name: "index_users_on_state_and_internal", where: "((ghost <> true) AND (bot_type IS NULL))", using: :btree
-    t.index ["state"], name: "index_users_on_state_and_internal_attrs", where: "((ghost <> true) AND (support_bot <> true))", using: :btree
-    t.index ["support_bot"], name: "index_users_on_support_bot", using: :btree
     t.index ["username"], name: "index_users_on_username", using: :btree
     t.index ["username"], name: "index_users_on_username_trigram", using: :gin, opclasses: {"username"=>"gin_trgm_ops"}
   end

ee/app/models/ee/user.rb

@@ -269,7 +269,10 @@ module EE
     end
 
     def bot?
-      has_bot_type? ? bot_type.present? : old_support_bot
+      return bot_type.present? if has_attribute?(:bot_type)
+
+      # Some older *migration* specs utilize this removed column
+      read_attribute(:support_bot)
     end
 
     protected
@@ -283,14 +286,6 @@ module EE
 
     private
 
-    def has_bot_type?
-      has_attribute?(:bot_type)
-    end
-
-    def old_support_bot
-      read_attribute(:support_bot)
-    end
-
     def namespace_union(select = :id)
       ::Gitlab::SQL::Union.new([
         ::Namespace.select(select).where(type: nil, owner: self),

ee/db/post_migrate/20190511144331_remove_users_support_type.rb

+# frozen_string_literal: true
+
+class RemoveUsersSupportType < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  INDEX_STATE_INTERNAL_ATTRS = 'index_users_on_state_and_internal_attrs'
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index :users, :state, name: INDEX_STATE_INTERNAL_ATTRS
+    remove_concurrent_index :users, :support_bot
+
+    remove_column :users, :support_bot
+  end
+
+  def down
+    add_column :users, :support_bot, :boolean
+
+    add_concurrent_index :users, :support_bot
+    add_concurrent_index :users, :state,
+      name: INDEX_STATE_INTERNAL_ATTRS,
+      where: 'ghost <> true AND support_bot <> true'
+  end
+end